package com.zzyl.runner;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.date.LocalDateTimeUtil;
import cn.hutool.core.lang.UUID;
import com.alibaba.fastjson.JSON;
import com.zzyl.constant.CacheConstants;
import com.zzyl.entity.DeviceData;
import com.zzyl.mapper.DeviceDataMapper;
import com.zzyl.mapper.DeviceMapper;
import com.zzyl.properties.AliyunIotProperties;
import com.zzyl.vo.DeviceVo;
import org.apache.commons.codec.binary.Base64;
import org.apache.qpid.jms.JmsConnection;
import org.apache.qpid.jms.JmsConnectionListener;
import org.apache.qpid.jms.message.JmsInboundMessageDispatch;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.jms.*;
import javax.naming.Context;
import javax.naming.InitialContext;
import java.net.URI;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

//@Component
public class AmqpClient implements ApplicationRunner {

    private final static Logger logger = LoggerFactory.getLogger(AmqpClient.class);

    @Autowired
    AliyunIotProperties aliyunIotProperties;
    @Autowired
    DeviceMapper deviceMapper;
    @Autowired
    DeviceDataMapper deviceDataMapper;
    @Resource
    StringRedisTemplate stringRedisTemplate;

    @Override
    public void run(ApplicationArguments args) throws Exception {

        String accessKey = aliyunIotProperties.getAccessKeyId();
        String accessSecret = aliyunIotProperties.getAccessKeySecret();
        String consumerGroupId = aliyunIotProperties.getConsumerGroupId();
        String iotInstanceId = aliyunIotProperties.getIotInstanceId();
        String host = aliyunIotProperties.getHost();

        String clientId = UUID.randomUUID().toString();
        int connectionCount = 4;


        List<Connection> connections = new ArrayList<>();

        //参数说明，请参见AMQP客户端接入说明文档。
        for (int i = 0; i < connectionCount; i++) {
            long timeStamp = System.currentTimeMillis();
            //签名方法：支持hmacmd5、hmacsha1和hmacsha256。
            String signMethod = "hmacsha1";

            //userName组装方法，请参见AMQP客户端接入说明文档。
            String userName = clientId + "-" + i + "|authMode=aksign"
                    + ",signMethod=" + signMethod
                    + ",timestamp=" + timeStamp
                    + ",authId=" + accessKey
                    + ",iotInstanceId=" + iotInstanceId
                    + ",consumerGroupId=" + consumerGroupId
                    + "|";
            //计算签名，password组装方法，请参见AMQP客户端接入说明文档。
            String signContent = "authId=" + accessKey + "&timestamp=" + timeStamp;
            String password = doSign(signContent, accessSecret, signMethod);
            String connectionUrl = "failover:(amqps://" + host + ":5671?amqp.idleTimeout=80000)"
                    + "?failover.reconnectDelay=30";

            Hashtable<String, String> hashtable = new Hashtable<>();
            hashtable.put("connectionfactory.SBCF", connectionUrl);
            hashtable.put("queue.QUEUE", "default");
            hashtable.put(Context.INITIAL_CONTEXT_FACTORY, "org.apache.qpid.jms.jndi.JmsInitialContextFactory");
            Context context = new InitialContext(hashtable);
            ConnectionFactory cf = (ConnectionFactory) context.lookup("SBCF");
            Destination queue = (Destination) context.lookup("QUEUE");
            // 创建连接。
            Connection connection = cf.createConnection(userName, password);
            connections.add(connection);

            ((JmsConnection) connection).addConnectionListener(myJmsConnectionListener);
            // 创建会话。
            // Session.CLIENT_ACKNOWLEDGE: 收到消息后，需要手动调用message.acknowledge()。
            // Session.AUTO_ACKNOWLEDGE: SDK自动ACK（推荐）。
            Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

            connection.start();
            // 创建Receiver连接。
            MessageConsumer consumer = session.createConsumer(queue);
            consumer.setMessageListener(messageListener);
        }

        logger.info("amqp client is started successfully.");
    }

    //业务处理异步线程池，线程池参数可以根据您的业务特点调整，或者您也可以用其他异步方式处理接收到的消息。
    private final static ExecutorService executorService = new ThreadPoolExecutor(
            Runtime.getRuntime().availableProcessors(),
            Runtime.getRuntime().availableProcessors() * 2, 60, TimeUnit.SECONDS,
            new LinkedBlockingQueue(50000));


    private MessageListener messageListener = new MessageListener() {
        @Override
        public void onMessage(final Message message) {
            try {
                //1.收到消息之后一定要ACK。
                // 推荐做法：创建Session选择Session.AUTO_ACKNOWLEDGE，这里会自动ACK。
                // 其他做法：创建Session选择Session.CLIENT_ACKNOWLEDGE，这里一定要调message.acknowledge()来ACK。
                // message.acknowledge();
                //2.建议异步处理收到的消息，确保onMessage函数里没有耗时逻辑。
                // 如果业务处理耗时过程过长阻塞住线程，可能会影响SDK收到消息后的正常回调。
                executorService.submit(new Runnable() {
                    @Override
                    public void run() {
                        processMessage(message);
                    }
                });
            } catch (Exception e) {
                logger.error("submit task occurs exception ", e);
            }
        }
    };

    /**
     * 在这里处理您收到消息后的具体业务逻辑。
     */
    private void processMessage(Message message) {
        try {
            byte[] body = message.getBody(byte[].class);
            String content = new String(body);

            //TODO 将消息内容封装到Java对象中
            ContentMessage contentMessage = JSON.parseObject(content, ContentMessage.class);

            //根据设备的iotId查询信息
            DeviceVo deviceVo = deviceMapper.selectByIotId(contentMessage.iotId);

            Map<String, ContentMessage.ItemData> items = contentMessage.getItems();

            //遍历map集合，将每一个键值对封装成一个DeviceData对象
            List<DeviceData> deviceDataList = new ArrayList<>();
            items.forEach((k, v) -> {
                //k表示功能属性，v表示数据
                //将每一个k,v 信息封装成一个DeviceData对象
                DeviceData deviceData = BeanUtil.toBean(deviceVo, DeviceData.class);
                deviceData.setFunctionId(k);//功能属性
                deviceData.setDataValue(v.value);//属性值
                deviceData.setAlarmTime(LocalDateTimeUtil.of(v.time));//上报时间
                deviceData.setAccessLocation(deviceVo.getRemark()); //接入位置描述
                //将设备属性数据添加到集合中
                deviceDataList.add(deviceData);
            });

            //批量添加设备的属性数据
            deviceDataMapper.batchInsert(deviceDataList);

            //TODO 将设备上报的数据添加到redis
            stringRedisTemplate.opsForHash().put(CacheConstants.IOT_DEVICE_LAST_DATA, contentMessage.iotId, JSON.toJSONString(deviceDataList));

        } catch (Exception e) {
            logger.error("processMessage occurs error ", e);
        }
    }

    private static JmsConnectionListener myJmsConnectionListener = new JmsConnectionListener() {
        /**
         * 连接成功建立。
         */
        @Override
        public void onConnectionEstablished(URI remoteURI) {
            logger.info("onConnectionEstablished, remoteUri:{}", remoteURI);
        }

        /**
         * 尝试过最大重试次数之后，最终连接失败。
         */
        @Override
        public void onConnectionFailure(Throwable error) {
            logger.error("onConnectionFailure, {}", error.getMessage());
        }

        /**
         * 连接中断。
         */
        @Override
        public void onConnectionInterrupted(URI remoteURI) {
            logger.info("onConnectionInterrupted, remoteUri:{}", remoteURI);
        }

        /**
         * 连接中断后又自动重连上。
         */
        @Override
        public void onConnectionRestored(URI remoteURI) {
            logger.info("onConnectionRestored, remoteUri:{}", remoteURI);
        }

        @Override
        public void onInboundMessage(JmsInboundMessageDispatch envelope) {
        }

        @Override
        public void onSessionClosed(Session session, Throwable cause) {
        }

        @Override
        public void onConsumerClosed(MessageConsumer consumer, Throwable cause) {
        }

        @Override
        public void onProducerClosed(MessageProducer producer, Throwable cause) {
        }
    };

    /**
     * 计算签名，password组装方法，请参见AMQP客户端接入说明文档。
     */
    private static String doSign(String toSignString, String secret, String signMethod) throws Exception {
        SecretKeySpec signingKey = new SecretKeySpec(secret.getBytes(), signMethod);
        Mac mac = Mac.getInstance(signMethod);
        mac.init(signingKey);
        byte[] rawHmac = mac.doFinal(toSignString.getBytes());
        return Base64.encodeBase64String(rawHmac);
    }


}
